Improvement in steam-gauge



E. H.ASHCROFT.

. Steam Gage.

NO. 67,096. Patented July 23, 1867.

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E. H. ASHCROFT, OF LYNN MASSACHU SETTS.

' Letters Patent No. 67,096, dated Jztly 23, 1867.

IMPROVEMENT IN STEAM-GAUGRDIALS.

TO ALL WHOM IT MAY CONCERN: V

' Be it known that I, E. H; ASHCROFT, of the city of Lynn, in the countyof Essex, in the State of Massachusett s,have invented a ne'wand usefulImprovement in Dials for Steam-Gauges, 860.; and I do hereby declarethat the following'is a full and exact description thereOfl'referencebeing had to the accompanying drawings, and to the letters ofreferencemarked thereon. I i A Thetnatnr e'of my invention consistsin.the construction of the dial of a. steam-pressure gauge which has ana'ddition of a second series of figures, whereby the same pointer willshow at the same time not only the pressure but the temperature of thesteam. v

I To enable others skilled in the art to make and use my invention, Iwill proceed to describe its construction and operation. I v

The drawing shows an elevation of an ordinary .steam-pr-essuregauge withmy improvement added.

A represents the gauge; B the dial; 0 the pointer. The outside figuresindicate the pressure, and the inside the corresponding temperature ofthe steam in the boiler due to the pressure. My dial, therefore, is adouble indicator. Y

Having thus described my invention, what I claim as new, anddesire tosecure by Letters Patent of-the United-States, isp In combination witha, steam-gauge, A, the graduated dial B, as shown and described, wherebythe temperature corresponding to any pressure is indi'cated at the sametime by the pointer.

E. H. ASHCROFT.

Witnesses:

CHARLES E. ASHCROFT, Enwm -J. -'WRIGHT.

